Need to Update CODESTYLE.md for Documentation

[ShiroTohu]

Documentation Issue Report

Your issue may already be reported! Please check out our active issues before creating one.

Description

When writing the documentation, I think the codestyle could be updated since there were some things that were a bit unclear when I was reviewing and making sure that the migrated documentation aligned with the predefined codestyle.

I think that these things needs to be added to the file.

• [x] Syntax for callouts
• [ ] How to write markdown documentation for methods
• [ ] How to write markdown documentation for attributes
• [ ] How to write markdown documentation for parameters
• [x] Code blocks (using shorthands or full name?)